<?php

/*
 * Copyright (C) 2014-2017 Franco Fichtner <franco@opnsense.org>
 * Copyright (C) 2010 Ermal Luçi
 * Copyright (C) 2005-2006 Colin Smith <ethethlay@gmail.com>
 * Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

function igmpproxy_enabled()
{
    global $config;

    return !empty($config['igmpproxy']['igmpentry']);
}

function igmpproxy_services()
{
    $services = array();

    if (!igmpproxy_enabled()) {
        return $services;
    }

    $pconfig = array();
    $pconfig['name'] = 'igmpproxy';
    $pconfig['description'] = gettext('IGMP Proxy');
    $pconfig['php']['restart'] = array('igmpproxy_configure_do');
    $pconfig['php']['start'] = array('igmpproxy_configure_do');
    $services[] = $pconfig;

    return $services;
}

function igmpproxy_configure()
{
    return array(
        'bootup' => array('igmpproxy_configure_do'),
        'newwanip' => array('igmpproxy_configure_do'),
    );
}

function igmpproxy_configure_do($verbose = false)
{
    global $config;

    killbyname('igmpproxy');

    if (!igmpproxy_enabled()) {
        return;
    }

    if ($verbose) {
        echo 'Starting IGMP Proxy...';
        flush();
    }

    $iflist = get_configured_interface_with_descr();

    $igmpconf = <<<EOD

##------------------------------------------------------
## Enable Quickleave mode (Sends Leave instantly)
##------------------------------------------------------
quickleave

EOD;

    foreach ($config['igmpproxy']['igmpentry'] as $igmpcf) {
        unset($iflist[$igmpcf['ifname']]);
        $realif = get_real_interface($igmpcf['ifname']);
        if (empty($igmpcf['threshold'])) {
            $threshld = 1;
        } else {
            $threshld = $igmpcf['threshold'];
        }
        $igmpconf .= "phyint {$realif} {$igmpcf['type']} ratelimit 0 threshold {$threshld}\n";

        if ($igmpcf['address'] <> "") {
            $item = explode(" ", $igmpcf['address']);
            foreach ($item as $iww) {
                $igmpconf .= "altnet {$iww}\n";
            }
        }
        $igmpconf .= "\n";
    }
    foreach ($iflist as $ifn => $unused) {
        $realif = get_real_interface($ifn);
        $igmpconf .= "phyint {$realif} disabled\n";
    }
    $igmpconf .= "\n";

    file_put_contents('/usr/local/etc/igmpproxy.conf', $igmpconf);
    mwexec('/usr/local/etc/rc.d/igmpproxy onestart');

    if ($verbose) {
        print "done.\n";
    }
}
